#include <stdio.h>
#include <math.h>
#include <stdlib.h>
#include "g726codec.h"
static const int qtab_726_16[1] = {
        261
};

static const int qtab_726_24[3] = {
        8, 218, 331
};

static const int qtab_726_32[7] = {
        -124, 80, 178, 246, 300, 349, 400
        };

static const int qtab_726_40[15] = {
        -122, -16,  68, 139, 198, 250, 298, 339,
                378, 413, 445, 475, 502, 528, 553
        };


static __inline int top_bit(unsigned int bits)
{
#if defined(__i386__)  ||  defined(__x86_64__)
        int res;

        __asm__(" xorl %[res],%[res];\n"
                " decl %[res];\n"
                " bsrl %[bits],%[res]\n"
                : [res] "=&r"(res)
                : [bits] "rm"(bits));
        return res;
#elif defined(__ppc__)  ||   defined(__powerpc__)
        int res;

        __asm__("cntlzw %[res],%[bits];\n"
                : [res] "=&r"(res)
                : [bits] "r"(bits));
        return 31 - res;
#elif defined(_M_IX86) // Visual Studio x86
        __asm {
                xor eax, eax
                dec eax
                bsr eax, bits
        }
#else
        int res;

        if (bits == 0) {
                return -1;
        }
        res = 0;
        if (bits & 0xFFFF0000) {
                bits &= 0xFFFF0000;
                res += 16;
        }
        if (bits & 0xFF00FF00) {
                bits &= 0xFF00FF00;
                res += 8;
        }
        if (bits & 0xF0F0F0F0) {
                bits &= 0xF0F0F0F0;
                res += 4;
        }
        if (bits & 0xCCCCCCCC) {
                bits &= 0xCCCCCCCC;
                res += 2;
        }
        if (bits & 0xAAAAAAAA) {
                bits &= 0xAAAAAAAA;
                res += 1;
        }
        return res;
#endif
}


bitstream_state_t *bitstream_init(bitstream_state_t *s)
{
        if (s == NULL) {
                return NULL;
        }
        s->bitstream = 0;
        s->residue = 0;
        return s;
}

/*
 * Given a raw sample, 'd', of the difference signal and a
 * quantization step size scale factor, 'y', this routine returns the
 * ADPCM codeword to which that sample gets quantized.  The step
 * size scale factor division operation is done in the log base 2 domain
 * as a subtraction.
 */
short quantize(int d,                  /* Raw difference signal sample */
               int y,                  /* Step size multiplier */
               const int table[],     /* quantization table */
               int quantizer_states)   /* table size of short integers */
{
        short dqm;    /* Magnitude of 'd' */
        short exp;    /* Integer part of base 2 log of 'd' */
        short mant;   /* Fractional part of base 2 log */
        short dl;     /* Log of magnitude of 'd' */
        short dln;    /* Step size scale factor normalized log */
        int i;
        int size;

        /*
         * LOG
         *
         * Compute base 2 log of 'd', and store in 'dl'.
         */
        dqm = (short) abs(d);
        exp = (short)(top_bit(dqm >> 1) + 1);
        /* Fractional portion. */
        mant = ((dqm << 7) >> exp) & 0x7F;
        dl = (exp << 7) + mant;

        /*
         * SUBTB
         *
         * "Divide" by step size multiplier.
         */
        dln = dl - (short)(y >> 2);

        /*
         * QUAN
         *
         * Search for codword i for 'dln'.
         */
        size = (quantizer_states - 1) >> 1;
        for (i = 0;  i < size;  i++) {
                if (dln < table[i]) {
                        break;
                }
        }
        if (d < 0) {
                /* Take 1's complement of i */
                return (short)((size << 1) + 1 - i);
        }
        if (i == 0  && (quantizer_states & 1)) {
                /* Zero is only valid if there are an even number of states, so
                   take the 1's complement if the code is zero. */
                return (short) quantizer_states;
        }
        return (short) i;
}
/*- End of function --------------------------------------------------------*/


/*
* returns the integer product of the 14-bit integer "an" and
* "floating point" representation (4-bit exponent, 6-bit mantessa) "srn".
*/
short fmult(short an, short srn)
{
        short anmag;
        short anexp;
        short anmant;
        short wanexp;
        short wanmant;
        short retval;

        anmag = (an > 0)  ?  an  : ((-an) & 0x1FFF);
        anexp = (short)(top_bit(anmag) - 5);
        anmant = (anmag == 0)  ?  32  : (anexp >= 0)  ? (anmag >> anexp)  : (anmag << -anexp);
        wanexp = anexp + ((srn >> 6) & 0xF) - 13;

        wanmant = (anmant * (srn & 0x3F) + 0x30) >> 4;
        retval = (wanexp >= 0)  ? ((wanmant << wanexp) & 0x7FFF)  : (wanmant >> -wanexp);

        return (((an ^ srn) < 0)  ?  -retval  :  retval);
}

/*
* Compute the estimated signal from the 6-zero predictor.
*/
static __inline short predictor_zero(g726_state_t *s)
{
        int i;
        int sezi;

        sezi = fmult(s->b[0] >> 2, s->dq[0]);
        /* ACCUM */
        for (i = 1;  i < 6;  i++) {
                sezi += fmult(s->b[i] >> 2, s->dq[i]);
        }
        return (short) sezi;
}
/*- End of function --------------------------------------------------------*/

/*
* Computes the estimated signal from the 2-pole predictor.
*/
static __inline short predictor_pole(g726_state_t *s)
{
        return (fmult(s->a[1] >> 2, s->sr[1]) + fmult(s->a[0] >> 2, s->sr[0]));
}

/*
* Computes the quantization step size of the adaptive quantizer.
*/
int step_size(g726_state_t *s)
{
        int y;
        int dif;
        int al;

        if (s->ap >= 256) {
                return s->yu;
        }
        y = s->yl >> 6;
        dif = s->yu - y;
        al = s->ap >> 2;
        if (dif > 0) {
                y += (dif * al) >> 6;
        } else if (dif < 0) {
                y += (dif * al + 0x3F) >> 6;
        }
        return y;
}
/*- End of function --------------------------------------------------------*/

/*
* Returns reconstructed difference signal 'dq' obtained from
* codeword 'i' and quantization step size scale factor 'y'.
* Multiplication is performed in log base 2 domain as addition.
*/
short reconstruct(int sign,    /* 0 for non-negative value */
                  int dqln,    /* G.72x codeword */
                  int y)       /* Step size multiplier */
{
        short dql;    /* Log of 'dq' magnitude */
        short dex;    /* Integer part of log */
        short dqt;
        short dq;     /* Reconstructed difference signal sample */

        dql = (short)(dqln + (y >> 2));   /* ADDA */

        if (dql < 0) {
                return ((sign)  ?  -0x8000  :  0);
        }
        /* ANTILOG */
        dex = (dql >> 7) & 15;
        dqt = 128 + (dql & 127);
        dq = (dqt << 7) >> (14 - dex);
        return ((sign)  ? (dq - 0x8000)  :  dq);
}
/*- End of function --------------------------------------------------------*/

/*
* updates the state variables for each output code
*/
void update(g726_state_t *s,
            int y,       /* quantizer step size */
            int wi,      /* scale factor multiplier */
            int fi,      /* for long/short term energies */
            int dq,      /* quantized prediction difference */
            int sr,      /* reconstructed signal */
            int dqsez)   /* difference from 2-pole predictor */
{
        short mag;
        short exp;
        short a2p;        /* LIMC */
        short a1ul;       /* UPA1 */
        short pks1;       /* UPA2 */
        short fa1;
        short ylint;
        short dqthr;
        short ylfrac;
        short thr;
        short pk0;
        int i;
        int tr;

        a2p = 0;
        /* Needed in updating predictor poles */
        pk0 = (dqsez < 0)  ?  1  :  0;

        /* prediction difference magnitude */
        mag = (short)(dq & 0x7FFF);
        /* TRANS */
        ylint = (short)(s->yl >> 15);             /* exponent part of yl */
        ylfrac = (short)((s->yl >> 10) & 0x1F);   /* fractional part of yl */
        /* Limit threshold to 31 << 10 */
        thr = (ylint > 9)  ? (31 << 10)  : ((32 + ylfrac) << ylint);
        dqthr = (thr + (thr >> 1)) >> 1;            /* dqthr = 0.75 * thr */
        if (!s->td) {                               /* signal supposed voice */
                tr = 0;
        } else if (mag <= dqthr) {                  /* supposed data, but small mag */
                tr = 0;    /* treated as voice */
        } else {                                    /* signal is data (modem) */
                tr = 1;
        }

        /*
        * Quantizer scale factor adaptation.
        */

        /* FUNCTW & FILTD & DELAY */
        /* update non-steady state step size multiplier */
        s->yu = (short)(y + ((wi - y) >> 5));

        /* LIMB */
        if (s->yu < 544) {
                s->yu = 544;
        } else if (s->yu > 5120) {
                s->yu = 5120;
        }

        /* FILTE & DELAY */
        /* update steady state step size multiplier */
        s->yl += s->yu + ((-s->yl) >> 6);

        /*
        * Adaptive predictor coefficients.
        */
        if (tr) {
                /* Reset the a's and b's for a modem signal */
                s->a[0] = 0;
                s->a[1] = 0;
                s->b[0] = 0;
                s->b[1] = 0;
                s->b[2] = 0;
                s->b[3] = 0;
                s->b[4] = 0;
                s->b[5] = 0;
        } else {
                /* Update the a's and b's */
                /* UPA2 */
                pks1 = pk0 ^ s->pk[0];

                /* Update predictor pole a[1] */
                a2p = s->a[1] - (s->a[1] >> 7);
                if (dqsez != 0) {
                        fa1 = (pks1)  ?  s->a[0]  :  -s->a[0];
                        /* a2p = function of fa1 */
                        if (fa1 < -8191) {
                                a2p -= 0x100;
                        } else if (fa1 > 8191) {
                                a2p += 0xFF;
                        } else {
                                a2p += fa1 >> 5;
                        }

                        if (pk0 ^ s->pk[1]) {
                                /* LIMC */
                                if (a2p <= -12160) {
                                        a2p = -12288;
                                } else if (a2p >= 12416) {
                                        a2p = 12288;
                                } else {
                                        a2p -= 0x80;
                                }
                        } else if (a2p <= -12416) {
                                a2p = -12288;
                        } else if (a2p >= 12160) {
                                a2p = 12288;
                        } else {
                                a2p += 0x80;
                        }
                }

                /* TRIGB & DELAY */
                s->a[1] = a2p;

                /* UPA1 */
                /* Update predictor pole a[0] */
                s->a[0] -= s->a[0] >> 8;
                if (dqsez != 0) {
                        if (pks1 == 0) {
                                s->a[0] += 192;
                        } else {
                                s->a[0] -= 192;
                        }
                }
                /* LIMD */
                a1ul = 15360 - a2p;
                if (s->a[0] < -a1ul) {
                        s->a[0] = -a1ul;
                } else if (s->a[0] > a1ul) {
                        s->a[0] = a1ul;
                }

                /* UPB : update predictor zeros b[6] */
                for (i = 0;  i < 6;  i++) {
                        /* Distinguish 40Kbps mode from the others */
                        s->b[i] -= s->b[i] >> ((s->bits_per_sample == 5)  ?  9  :  8);
                        if (dq & 0x7FFF) {
                                /* XOR */
                                if ((dq ^ s->dq[i]) >= 0) {
                                        s->b[i] += 128;
                                } else {
                                        s->b[i] -= 128;
                                }
                        }
                }
        }

        for (i = 5;  i > 0;  i--) {
                s->dq[i] = s->dq[i - 1];
        }
        /* FLOAT A : convert dq[0] to 4-bit exp, 6-bit mantissa f.p. */
        if (mag == 0) {
                s->dq[0] = (dq >= 0)  ?  0x20  :  0xFC20;
        } else {
                exp = (short)(top_bit(mag) + 1);
                s->dq[0] = (dq >= 0)
                           ? ((exp << 6) + ((mag << 6) >> exp))
                           : ((exp << 6) + ((mag << 6) >> exp) - 0x400);
        }

        s->sr[1] = s->sr[0];
        /* FLOAT B : convert sr to 4-bit exp., 6-bit mantissa f.p. */
        if (sr == 0) {
                s->sr[0] = 0x20;
        } else if (sr > 0) {
                exp = (short)(top_bit(sr) + 1);
                s->sr[0] = (short)((exp << 6) + ((sr << 6) >> exp));
        } else if (sr > -32768) {
                mag = (short) - sr;
                exp = (short)(top_bit(mag) + 1);
                s->sr[0] = (exp << 6) + ((mag << 6) >> exp) - 0x400;
        } else {
                s->sr[0] = (short) 0xFC20;
        }

        /* DELAY A */
        s->pk[1] = s->pk[0];
        s->pk[0] = pk0;

        /* TONE */
        if (tr) {               /* this sample has been treated as data */
                s->td = 0;    /* next one will be treated as voice */
        } else if (a2p < -11776) { /* small sample-to-sample correlation */
                s->td = 1;    /* signal may be data */
        } else {                /* signal is voice */
                s->td = 0;
        }

        /* Adaptation speed control. */
        /* FILTA */
        s->dms += ((short) fi - s->dms) >> 5;
        /* FILTB */
        s->dml += (((short)(fi << 2) - s->dml) >> 7);

        if (tr) {
                s->ap = 256;
        } else if (y < 1536) {                  /* SUBTC */
                s->ap += (0x200 - s->ap) >> 4;
        } else if (s->td) {
                s->ap += (0x200 - s->ap) >> 4;
        } else if (abs((s->dms << 2) - s->dml) >= (s->dml >> 3)) {
                s->ap += (0x200 - s->ap) >> 4;
        } else {
                s->ap += (-s->ap) >> 4;
        }
}

/*
* Decodes a 2-bit CCITT G.726_16 ADPCM code and returns
* the resulting 16-bit linear PCM, A-law or u-law sample value.
*/
short g726_16_decoder(g726_state_t *s, unsigned char code)
{
        short sezi;
        short sei;
        short se;
        short sr;
        short dq;
        short dqsez;
        int y;

        /* Mask to get proper bits */
        code &= 0x03;
        sezi = predictor_zero(s);
        sei = sezi + predictor_pole(s);

        y = step_size(s);
        dq = reconstruct(code & 2, g726_16_dqlntab[code], y);

        /* Reconstruct the signal */
        se = sei >> 1;
        sr = (dq < 0)  ? (se - (dq & 0x3FFF))  : (se + dq);

        /* Pole prediction difference */
        dqsez = sr + (sezi >> 1) - se;

        update(s, y, g726_16_witab[code], g726_16_fitab[code], dq, sr, dqsez);

        return (sr << 2);
}
/*- End of function --------------------------------------------------------*/


/*
 * Encodes a linear PCM, A-law or u-law input sample and returns its 3-bit code.
 */
unsigned char g726_16_encoder(g726_state_t *s, short amp)
{
        int y;
        short sei;
        short sezi;
        short se;
        short d;
        short sr;
        short dqsez;
        short dq;
        short i;

        sezi = predictor_zero(s);
        sei = sezi + predictor_pole(s);
        se = sei >> 1;
        d = amp - se;

        /* Quantize prediction difference */
        y = step_size(s);
        i = quantize(d, y, qtab_726_16, 4);
        dq = reconstruct(i & 2, g726_16_dqlntab[i], y);

        /* Reconstruct the signal */
        sr = (dq < 0)  ? (se - (dq & 0x3FFF))  : (se + dq);

        /* Pole prediction difference */
        dqsez = sr + (sezi >> 1) - se;

        update(s, y, g726_16_witab[i], g726_16_fitab[i], dq, sr, dqsez);
        return (unsigned char) i;
}

/*
* Decodes a 3-bit CCITT G.726_24 ADPCM code and returns
* the resulting 16-bit linear PCM, A-law or u-law sample value.
*/
short g726_24_decoder(g726_state_t *s, unsigned char code)
{
        short sezi;
        short sei;
        short se;
        short sr;
        short dq;
        short dqsez;
        int y;

        /* Mask to get proper bits */
        code &= 0x07;
        sezi = predictor_zero(s);
        sei = sezi + predictor_pole(s);

        y = step_size(s);
        dq = reconstruct(code & 4, g726_24_dqlntab[code], y);

        /* Reconstruct the signal */
        se = sei >> 1;
        sr = (dq < 0)  ? (se - (dq & 0x3FFF))  : (se + dq);

        /* Pole prediction difference */
        dqsez = sr + (sezi >> 1) - se;

        update(s, y, g726_24_witab[code], g726_24_fitab[code], dq, sr, dqsez);

        return (sr << 2);
}
/*- End of function --------------------------------------------------------*/


/*
 * Encodes a linear PCM, A-law or u-law input sample and returns its 3-bit code.
 */
unsigned char g726_24_encoder(g726_state_t *s, short amp)
{
        short sei;
        short sezi;
        short se;
        short d;
        short sr;
        short dqsez;
        short dq;
        short i;
        int y;

        sezi = predictor_zero(s);
        sei = sezi + predictor_pole(s);
        se = sei >> 1;
        d = amp - se;

        /* Quantize prediction difference */
        y = step_size(s);
        i = quantize(d, y, qtab_726_24, 7);
        dq = reconstruct(i & 4, g726_24_dqlntab[i], y);

        /* Reconstruct the signal */
        sr = (dq < 0)  ? (se - (dq & 0x3FFF))  : (se + dq);

        /* Pole prediction difference */
        dqsez = sr + (sezi >> 1) - se;

        update(s, y, g726_24_witab[i], g726_24_fitab[i], dq, sr, dqsez);
        return (unsigned char) i;
}


/*
* Decodes a 4-bit CCITT G.726_32 ADPCM code and returns
* the resulting 16-bit linear PCM, A-law or u-law sample value.
*/
short g726_32_decoder(g726_state_t *s, unsigned char code)
{
        short sezi;
        short sei;
        short se;
        short sr;
        short dq;
        short dqsez;
        int y;

        /* Mask to get proper bits */
        code &= 0x0F;
        sezi = predictor_zero(s);
        sei = sezi + predictor_pole(s);

        y = step_size(s);
        dq = reconstruct(code & 8, g726_32_dqlntab[code], y);

        /* Reconstruct the signal */
        se = sei >> 1;
        sr = (dq < 0)  ? (se - (dq & 0x3FFF))  : (se + dq);

        /* Pole prediction difference */
        dqsez = sr + (sezi >> 1) - se;

        update(s, y, g726_32_witab[code], g726_32_fitab[code], dq, sr, dqsez);

        return (sr << 2);
}
/*- End of function --------------------------------------------------------*/

/*
 * Encodes a linear input sample and returns its 4-bit code.
 */
unsigned char g726_32_encoder(g726_state_t *s, short amp)
{
        short sei;
        short sezi;
        short se;
        short d;
        short sr;
        short dqsez;
        short dq;
        short i;
        int y;

        sezi = predictor_zero(s);
        sei = sezi + predictor_pole(s);
        se = sei >> 1;
        d = amp - se;

        /* Quantize the prediction difference */
        y = step_size(s);
        i = quantize(d, y, qtab_726_32, 15);
        dq = reconstruct(i & 8, g726_32_dqlntab[i], y);

        /* Reconstruct the signal */
        sr = (dq < 0)  ? (se - (dq & 0x3FFF))  : (se + dq);

        /* Pole prediction difference */
        dqsez = sr + (sezi >> 1) - se;

        update(s, y, g726_32_witab[i], g726_32_fitab[i], dq, sr, dqsez);
        return (unsigned char) i;
}

/*
* Decodes a 5-bit CCITT G.726 40Kbps code and returns
* the resulting 16-bit linear PCM, A-law or u-law sample value.
*/
short g726_40_decoder(g726_state_t *s, unsigned char code)
{
        short sezi;
        short sei;
        short se;
        short sr;
        short dq;
        short dqsez;
        int y;

        /* Mask to get proper bits */
        code &= 0x1F;
        sezi = predictor_zero(s);
        sei = sezi + predictor_pole(s);

        y = step_size(s);
        dq = reconstruct(code & 0x10, g726_40_dqlntab[code], y);

        /* Reconstruct the signal */
        se = sei >> 1;
        sr = (dq < 0)  ? (se - (dq & 0x7FFF))  : (se + dq);

        /* Pole prediction difference */
        dqsez = sr + (sezi >> 1) - se;

        update(s, y, g726_40_witab[code], g726_40_fitab[code], dq, sr, dqsez);

        return (sr << 2);
}
/*- End of function --------------------------------------------------------*/


/*
 * Encodes a 16-bit linear PCM, A-law or u-law input sample and retuens
 * the resulting 5-bit CCITT G.726 40Kbps code.
 */
unsigned char g726_40_encoder(g726_state_t *s, short amp)
{
        short sei;
        short sezi;
        short se;
        short d;
        short sr;
        short dqsez;
        short dq;
        short i;
        int y;

        sezi = predictor_zero(s);
        sei = sezi + predictor_pole(s);
        se = sei >> 1;
        d = amp - se;

        /* Quantize prediction difference */
        y = step_size(s);
        i = quantize(d, y, qtab_726_40, 31);
        dq = reconstruct(i & 0x10, g726_40_dqlntab[i], y);

        /* Reconstruct the signal */
        sr = (dq < 0)  ? (se - (dq & 0x7FFF))  : (se + dq);

        /* Pole prediction difference */
        dqsez = sr + (sezi >> 1) - se;

        update(s, y, g726_40_witab[i], g726_40_fitab[i], dq, sr, dqsez);
        return (unsigned char) i;
}

g726_state_t *_g726_init(g726_state_t *s, int bit_rate)
{
        int i;

        if (bit_rate != 16000  &&  bit_rate != 24000  &&  bit_rate != 32000  &&  bit_rate != 40000) {
                return NULL;
        }

        s->yl = 34816;
        s->yu = 544;
        s->dms = 0;
        s->dml = 0;
        s->ap = 0;
        s->rate = bit_rate;

        for (i = 0; i < 2; i++) {
                s->a[i] = 0;
                s->pk[i] = 0;
                s->sr[i] = 32;
        }
        for (i = 0; i < 6; i++) {
                s->b[i] = 0;
                s->dq[i] = 32;
        }
        s->td = 0;
        switch (bit_rate) {
        case 16000:
                s->enc_func = g726_16_encoder;
                s->dec_func = g726_16_decoder;
                s->bits_per_sample = 2;
                break;
        case 24000:
                s->enc_func = g726_24_encoder;
                s->dec_func = g726_24_decoder;
                s->bits_per_sample = 3;
                break;
        case 32000:
        default:
                s->enc_func = g726_32_encoder;
                s->dec_func = g726_32_decoder;
                s->bits_per_sample = 4;
                break;
        case 40000:
                s->enc_func = g726_40_encoder;
                s->dec_func = g726_40_decoder;
                s->bits_per_sample = 5;
                break;
        }
        bitstream_init(&s->bs);
        return s;
}

int _g726_decode(g726_state_t *s, short amp[], const unsigned char g726_data[], int g726_bytes)
{
        int i;
        int samples;
        unsigned char code;
        int sl;

        for (samples = i = 0;  ;) {
                if (s->bs.residue < s->bits_per_sample) {
                        if (i >= g726_bytes) {
                                break;
                        }
                        s->bs.bitstream = (s->bs.bitstream << 8) | g726_data[i++];
                        s->bs.residue += 8;
                }
                code = (unsigned char)((s->bs.bitstream >> (s->bs.residue - s->bits_per_sample)) & ((1 << s->bits_per_sample) - 1));

                s->bs.residue -= s->bits_per_sample;

                sl = s->dec_func(s, code);

                amp[samples++] = (short) sl;
        }
        return samples;
}


int _g726_encode(g726_state_t *s, unsigned char g726_data[], const short amp[], int len)
{
        int i;
        int g726_bytes;
        short sl;
        unsigned char code;

        for (g726_bytes = i = 0;  i < len;  i++) {
                sl = amp[i] >> 2;

                code = s->enc_func(s, sl);

                s->bs.bitstream = (s->bs.bitstream << s->bits_per_sample) | code;
                s->bs.residue += s->bits_per_sample;
                if (s->bs.residue >= 8) {
                        g726_data[g726_bytes++] = (unsigned char)((s->bs.bitstream >> (s->bs.residue - 8)) & 0xFF);
                        s->bs.residue -= 8;
                }
        }
        return g726_bytes;
}


void *g726_encoder_init(unsigned int bitrate)
{
        g726_state_t *s = (g726_state_t *)malloc(sizeof(g726_state_t));
        if (!s) {
                return NULL;
        }
        _g726_init(s, bitrate);
        return (void *)s;
}

void *g726_decoder_init(unsigned int bitrate)
{
        g726_state_t *s = (g726_state_t *)malloc(sizeof(g726_state_t));
        if (!s) {
                return NULL;
        }
        _g726_init(s, bitrate);
        return (void *)s;
}


int g726_encode(void *encoder, unsigned char g726_data[], const short amp[], int len)
{
        g726_state_t *s = (g726_state_t *)encoder;
        return _g726_encode(s, g726_data, amp, len);
}

int g726_decode(void *decoder, short amp[], const unsigned char g726_data[], int g726_bytes)
{
        g726_state_t *s = (g726_state_t *)decoder;
        return _g726_decode(s, amp, g726_data, g726_bytes);

}



